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[3/3] input: spear-keyboard: Fix for balancing the enable_irq_wake

Message ID 367241d1362f7b642e223bb7e7b108bc72df0851.1352381962.git.viresh.kumar@linaro.org (mailing list archive)
State New, archived
Headers show

Commit Message

Viresh Kumar Nov. 8, 2012, 1:40 p.m. UTC 
From: Deepak Sikri <deepak.sikri@st.com>

This patch handles the fix for unbalanced irq for the cases when
enable_irq_wake fails, and a warning related to same is displayed
on the console. The workaround is handled at the driver level.

Signed-off-by: Deepak Sikri <deepak.sikri@st.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
 drivers/input/keyboard/spear-keyboard.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)
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Patch

diff --git a/drivers/input/keyboard/spear-keyboard.c b/drivers/input/keyboard/spear-keyboard.c
index 9792924..b8784df 100644
--- a/drivers/input/keyboard/spear-keyboard.c
+++ b/drivers/input/keyboard/spear-keyboard.c
@@ -60,6 +60,7 @@  struct spear_kbd {
 	struct clk *clk;
 	unsigned int irq;
 	unsigned int mode;
+	unsigned int irq_wake;
 	unsigned short last_key;
 	unsigned short keycodes[NUM_ROWS * NUM_COLS];
 	bool rep;
@@ -327,7 +328,8 @@  static int spear_kbd_suspend(struct device *dev)
 	mode_ctl_reg = readl_relaxed(kbd->io_base + MODE_CTL_REG);
 
 	if (device_may_wakeup(&pdev->dev)) {
-		enable_irq_wake(kbd->irq);
+		if (!enable_irq_wake(kbd->irq))
+			kbd->irq_wake = 1;
 
 		/*
 		 * reprogram the keyboard operating frequency as on some
@@ -373,7 +375,10 @@  static int spear_kbd_resume(struct device *dev)
 	mutex_lock(&input_dev->mutex);
 
 	if (device_may_wakeup(&pdev->dev)) {
-		disable_irq_wake(kbd->irq);
+		if (kbd->irq_wake) {
+			kbd->irq_wake = 0;
+			disable_irq_wake(kbd->irq);
+		}
 	} else {
 		if (input_dev->users)
 			clk_enable(kbd->clk);